day07java基础的最后一天，每天是架构

程序员文章站 2022-03-09 20:16:33

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day07

练习：球球大作战简易版

package cn.tedu.game;

import java.awt.Color;

import java.awt.Graphics;

/**

小球：
直径、坐标、颜色、速度、方向
1.设计类：抽象类 —Ball
设计类----BallMain, BallJPanel ,BallAndBall
2.分析：小球的绘制
让一个小球运动、多个运动、小球碰撞、大的把小的吃了
@author Administrator
*
*/
public class Ball{
//成员变量— 属性
int x,y, d,dir;//x坐标，y坐标，直径，方向
int speed;//速度
Color ballColor;//小球的颜色
public static final int LEFT_UP = 0;//左上
public static final int RIGHT_UP = 1;//右上
public static final int LEFT_DOWN = 2;//左下
public static final int RIGHT_DOWN = 3;//右下

/构造方法/
public Ball(int x, int y, int dir, int d, int speed, Color ballColor){
this.x = x;
this.y = y;
this.dir = dir;
this.d = d;
this.speed = speed;
this.ballColor = ballColor;
}
/绘制小球/
public void drawBall(Graphics g){
g.setColor(ballColor);
g.fillOval(x, y, d, d);

}
//小球移动方向的判断
public void moveBall(){
```
switch(this.dir)
{	
case LEFT_UP://左上

x -= speed;
y -= speed;
if(x <= 0){
	dir = RIGHT_UP;
}else if(y <= 0){
	dir = LEFT_DOWN;
}
break;

case  RIGHT_UP://右上
	
	x += speed;
	y -= speed;
	if( y <= 0){
		dir = RIGHT_DOWN;
	}else if(x >= BallMain.WIDTH - d){
		dir = LEFT_UP;
	}
break;

case LEFT_DOWN:
	
	x -= speed;
	y += speed;
	if(x <= 0){
		dir = RIGHT_DOWN;
	}else if(y >= BallMain.HEIGHT - d){
		dir = LEFT_UP;
	}
	break;
	
case RIGHT_DOWN:
	x += speed;
	y += speed;
	if(x >= BallMain.WIDTH - d){
		dir = LEFT_DOWN;
	}else if(y >= BallMain.HEIGHT - d){
		dir = RIGHT_UP;
	}
	break;
}

}
```

}

package cn.tedu.game;

小球碰撞分析
*/
public class BallAndBall {
//是否发生碰撞
public boolean isBallCrach(Ball b1,Ball b2){

boolean flag = false;
int x1 = b1.x + b2.d/2;
int y1 = b1.y + b2.d/2;
int x2 = b2.x + b2.d/2;
int y2 = b2.y + b2.d/2;

//计算圆心距
double e = Math.sqrt((x1 - x2)*(x1 - x2) +(y1 - y2) +(y1 - y2));
//碰撞上了
if(e <= b1.d/2 + b2.d/2){//撞上了
	return true;
}
return flag;

}

//小球的碰撞分析
public void ballCrach(Ball b1,Ball b2){
int x1 = b1.x + b2.d/2;
int y1 = b1.y + b2.d/2;
int x2 = b2.x + b2.d/2;
int y2 = b2.y + b2.d/2;

//计算圆心距
double e = Math.sqrt((x1 - x2)*(x1 - x2) +(y1 - y2) +(y1 - y2));
//碰撞上了
if(e <= b1.d/2 + b2.d/2){
	//小球1
	switch(b1.dir){
	case Ball.LEFT_UP:
		b1.dir = Ball.RIGHT_DOWN;
		break;
	case Ball.RIGHT_UP:
		b1.dir = Ball.LEFT_DOWN;
		break;
	case Ball.LEFT_DOWN:
		b1.dir = Ball.RIGHT_UP;
		break;
	case Ball.RIGHT_DOWN:
		b1.dir = Ball.LEFT_UP;
		break;
	
	}

  
		}
//球2的方向处理
	if(e <= b1.d/2 + b2.d/2){
		//小球2
		switch(b2.dir){
		case Ball.LEFT_UP:
			b2.dir = Ball.RIGHT_DOWN;
			break;
		case Ball.RIGHT_UP:
			b2.dir = Ball.LEFT_DOWN;
			break;
		case Ball.LEFT_DOWN:
			b2.dir = Ball.RIGHT_UP;
			break;
		case Ball.RIGHT_DOWN:
			b2.dir = Ball.LEFT_UP;
			break;
        }

    }

}
}
package cn.tedu.game;
import java.awt.Color;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JPanel;
import com.sun.prism.Graphics;
/**

画布

@author Administrator
*
*/
public class BallJPanel extends JPanel{

/集合------存储小球的/
List ballList = new ArrayList();
/小球的数量/
private int ballNumber = 30;
int score = 0;
/构造方法/
public BallJPanel(){
//添加小球
addBalls();
}
/添加小球/
public void addBalls(){

for (int i = 0; i < ballNumber; i++){
	int x = (int) (Math.random()*BallMain.WIDTH);
	int y  = (int) (Math.random()*BallMain.HEIGHT);
	int d =  (int) (Math.random()*60);
	int dir  =(int) (Math.random()*4);
	int speed = (int) (Math.random()*20 + 10);
	int red  = (int) (Math.random()*256);
	int green = (int) (Math.random()*256);
	int blue = (int) (Math.random()*256);
	
	Color ballColor = new Color(red,green,blue);
	
	//产生小球
	Ball b  = new Ball(x, y, dir, d, speed, ballColor);
	ballList.add(b);//将产生的小球添加到集合中
}

}
@Override
public void paint(java.awt.Graphics g){
super.paint(g);
//遍历集合中的所有小球
for (int i = 0; i < ballList.size(); i++){
///取出每一个小球进行绘制
Ball b = ballList.get(i);
g.setColor(b.ballColor);
g.fillOval(b.x, b.y,b.d, b.d);
}
g.drawString(“分数：”+score,30,45);
}
//线程
public void startBalls(){
//启动线程
new Thread(){
public void run(){

		//System.out.println("启动线程了");
	while(true){
		//遍历所有小球
		for(int i = 0;i <ballList.size();i++){
			Ball b = ballList.get(i);
			b.moveBall();
		}
		for(int i = 0;i < ballList.size();i++){
			Ball b1 = ballList.get(i);
			for(int j = i + 1; j < ballList.size();j++){
				Ball b2 = ballList.get(j);
				BallAndBall bab = new BallAndBall();
				//bab.ballCrach(b1, b2);
				if(bab.isBallCrach(b1, b2)){
					if(b1.d >= b2.d){
						score += 5;
						b1.d+= b2.d/3;
						ballList.remove(b2);
						break;
					}else if(b1.d <= b2.d){
						score += 3;
						b2.d+= b1.d/3;
						ballList.remove(b1);
						break;
					}
				}
			}
		}
		repaint();
		try{
		Thread.sleep(10);
		}catch(InterruptedException e){
			e.printStackTrace();
		}
	}
	}
	
}.start();

}
}
package cn.tedu.game;
import javax.swing.JFrame;
/**

小球的主函数类
@author Administrator
*
*/
public class BallMain extends JFrame{
public static final int WIDTH = 1400;
public static final int HEIGHT = 800;
/小球的构造方法/
public BallMain(){
this.setTitle(“球球大作战V简易版”);
this.setSize(WIDTH,HEIGHT);
this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);//居中显示
```
BallJPanel bj = new BallJPanel();
this.add(bj);



this.setVisible(true);
//加载小球启动
bj.startBalls();
```
}
/*主函数，程序的入口/
public static void main(String[] args){
new BallMain();
}
}